Let `f(x) = (x+2)/(x-4)` and `g(x) = (2 x+22)/( x^2-3 x-4)`.
Simplify `f(x)-g(x)`:
The values of x that need to be excluded from the domain of the difference function are x =
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
Box 2: Enter your answer as a list of integer or decimal numbers separated with commas: Examples: -4, 3, 2.5172
Enter DNE for Does Not Exist, oo for Infinity